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Bismuth-layer-structured red light emitting phosphor, preparation method thereof, and application thereof

A phosphor and bismuth layered technology, which is applied in the field of red light-emitting phosphors and its preparation, can solve the problems of reducing the luminous intensity and chromaticity uniformity of phosphors, inaccurate product stoichiometric ratios, and inability to uniformly distribute activated ions. , to achieve the effect of easy control, narrow particle size distribution and high luminous brightness

Inactive Publication Date: 2014-04-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the traditional phosphor preparation method is mainly the high-temperature (>1300°C) solid-phase reaction method of oxides. This method has the disadvantages that the reaction process is difficult to control, the stoichiometric ratio of the obtained products is not accurate, and the active ions cannot be uniformly distributed in the matrix. Disadvantages, which reduce the luminous intensity and chromaticity uniformity of the phosphor

Method used

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  • Bismuth-layer-structured red light emitting phosphor, preparation method thereof, and application thereof
  • Bismuth-layer-structured red light emitting phosphor, preparation method thereof, and application thereof
  • Bismuth-layer-structured red light emitting phosphor, preparation method thereof, and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Nb 2 o 5 Dissolve in 40% HF at 80-90°C, and then drop NH into it 3 ·H 2 O solution to pH 8.5-9.5, forming white Nb(OH) 5 Precipitate, aged at room temperature for 12 hours, dissolved in C after filtering and washing 6 h 8 o 7 ·H 2 O aqueous solution (84.5g / L), C 6 h 8 o 7 ·H 2 O and Nb 2 o 5 The molar ratio is 16: 1, forming transparent Nb-C 6 h 8 o 7 solution;

[0030] (2) According to the molar ratio of Nb 5+ : Ti 4+ : Bi 3+ : Eu 3+ : EDTA = 1 : 1 : 2.85 : 0.15 : 3.3 and NH 4 NO 3 : C 6 h 8 o 7 ·H 2 The ratio of O = 4.5: 1 will Ti(C 4 h 9 O) 4 , Bi(NO 3 ) 3 ·5H 2 O, Eu(NO 3 ) 3 , EDTA and NH 4 NO 3 sequentially added to the Nb-C produced in step (1) 6 h 8 o 7 In the solution, a transparent solution was formed, heated and stirred at 100°C to obtain a light yellow precursor gel;

[0031] (3) Burn the precursor gel at 550 °C for 15 minutes to obtain Bi 2.85 NbTiO 9 :0.05Eu 3+ Precursor powder;

[0032] (4) will get Bi ...

Embodiment 2

[0039] (1) Nb 2 o 5 Dissolve in 40% HF at 80-90°C, and then drop NH into it 3 ·H 2 O solution to pH 8.5-9.5, forming white Nb(OH) 5 Precipitate, aged at room temperature for 14 hours, dissolved in C after filtering and washing 6 h 8 o 7 ·H 2 O aqueous solution (84.5g / L), C 6 h 8 o 7 ·H 2 O and Nb 2 o 5 The molar ratio is 10: 1, forming transparent Nb-C 6 h 8 o 7 solution;

[0040] (2) According to the molar ratio of Nb 5+ : Ti 4+ : Bi 3+ : Eu 3+ : EDTA = 1 : 1 : 2.97 : 0.03 : 3.75 and NH 4 NO 3 : C 6 h 8 o 7 ·H 2 O = 4.25: 1 ratio will Ti(C 4 h 9 O) 4 , Bi(NO 3 ) 3 ·5H 2 O, Eu(NO 3 ) 3 , EDTA and NH 4 NO 3 sequentially added to the Nb-C produced in step (1) 6 h 8 o 7 In the solution, a transparent solution was formed, heated and stirred at 100°C to obtain a light yellow precursor gel;

[0041] (3) Burn the precursor gel at 575 °C for 35 minutes to obtain Bi 2.97 NbTiO 9 :0.01Eu 3+ Precursor powder;

[0042] (4) will get Bi 2.97 ...

Embodiment 3

[0044] (1) Nb 2 o 5 Dissolve in 40% HF at 80-90°C, and then drop NH into it 3 ·H 2 O solution to pH 8.5-9.5, forming white Nb(OH) 5 The precipitate was aged for 10 hours at room temperature, and the precipitate was filtered, washed and dissolved in C 6 h 8 o 7 ·H 2 O (citric acid) aqueous solution (84.5g / L), C 6 h 8 o 7 ·H 2 O and Nb 2 o 5 The molar ratio is 8: 1, forming transparent Nb-C 6 h 8 o 7 solution;

[0045] (2) According to the molar ratio: Nb 5+ : Ti 4+ : Bi 3+ : Eu 3+ : EDTA = 1 : 1 : 2.991 : 0.009 : 3.5 and NH 4 NO 3 : C 6 h 8 o 7 ·H 2 The ratio of O = 4: 1 will be Ti(C 4 h 9 O) 4, Bi(NO 3 ) 3 ·5H 2 O, Eu(NO 3 ) 3 , EDTA and NH 4 NO 3 sequentially added to the Nb-C produced in step (1) 6 h 8 o 7 In the solution, a transparent solution was formed, heated and stirred at 100°C to obtain a light yellow precursor gel;

[0046] (3) Burn the precursor gel at 525 °C for 55 minutes to obtain Bi 2.991 NbTiO 9 :0.003Eu 3+ Precur...

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Abstract

The invention discloses a bismuth-layer-structured red light emitting phosphor with a chemical general formula of Bi3-3xNbTiO9:xEu<3+>, wherein x is no less than 0.001 and no larger than 0.15. The invention also discloses a preparation method of the phosphor, and an application of the phosphor. The technological process is safe, simple, and easy to control. No complicated equipment is required. The obtained red light emitting phosphor is advantaged in good chemical stability, no toxicity, and no radiation. Under excitation of AlGaN (350-360nm) and GaN (390-400nm) purple light LEDs, red light emission peaks with relatively high luminous intensity can be obtained. Therefore, the bismuth-layer-structured red light emitting phosphor can be used in fields of white light LED illumination and displaying.

Description

technical field [0001] The invention relates to a red light-emitting phosphor and its preparation method and application, in particular to a red light-emitting phosphor with a bismuth layered structure (Aurivillius structure) and its preparation method and application, belonging to the technical field of luminescent materials. Background technique [0002] Since the 1960s, people have successfully developed the Y 2 o 3 :Eu 3+ and YVO 4 :Eu 3+ Since red light-emitting phosphors were popularized in color TV sets, rare earth-doped red light-emitting phosphors have developed rapidly and are widely used in various color displays and lighting such as photoluminescence, cathode ray luminescence, and X-ray luminescence. Fields such as cathode ray tube (CRT), flat panel display (FPD), plasma display (PDP), field emission (FED) and solid state lighting (SSL). [0003] Recently, the application of three-color rare earth-doped fluorescent materials in the new generation of color T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/74H01L33/50
CPCY02B20/181Y02B20/00
Inventor 马谦吕孟凯杨萍张爱玉曹永强
Owner UNIV OF JINAN